I used to have my betta in the same kind of tank in black. It got way too much algae buildup though so I switched. What's up with the tube/air stone arrangement?

Yeah, Walmart sells the black ones now--this one is really old, so back when I bought it they were all white! As for the tube/air stone arrangement, it's because after the second time Gallifrey swam down the tube (despite adjustments to the 'guard' for it) and got stuck under the grating, we had to close off the tube totally. It's sealed with saran-wrap and plumber's tape. We couldn't take it out either, since it would mess with the lighting in the tank. :/ The airstone tube just hangs out in there because he actually LOVES the bubbles, so we leave it down there and turn it on for short periods of time for him to play. Sometimes we take it out, but usually we just leave it in.

I changed some plants around / added more as well as upgraded the lighting.
Ill possibly add some other background plant to that back space that looks pretty blank..
Not sure whats a good low tech plant that wont over tank my tank, suggestions??

I changed some plants around / added more as well as upgraded the lighting.
Ill possibly add some other background plant to that back space that looks pretty blank..
Not sure whats a good low tech plant that wont over tank my tank, suggestions??